See above. The competition version of the Trango Ice, which is the ice version of the venerable Trango. From La Sportiva's site:
Ice climbing "tool", used by the best international athletes during their performances on the natural walls and in ice climbing competitions. Light, insulated, incredibly precise. The innovative system of multidirectional hinge of the ankle "3D Flex system", allows freedom of movement for any climbing positions. The 100% carbon fiber midsole allows optimum stiffness against torsion and is perfectly suitable for crampons, making the boot the lightest in this specific category.